Hack (programming language)
Hack is a programming language for the HipHop Virtual Machine (HHVM), created by Meta (formerly Facebook) as a dialect of PHP. The language implementation is open-source, licensed under the MIT License.
| Designed by | Julien Verlaguet, Alok Menghrajani, Drew Paroski, and others |
|---|---|
| Developer | Meta Platforms |
| First appeared | 2014 |
| Typing discipline | Static, dynamic, weak, gradual |
| OS | Cross-platform |
| License | MIT License |
| Website | hacklang |
| Influenced by | |
| PHP, OCaml, Java, C#, Scala, Haskell | |
Hack allows programmers to use both dynamic typing and static typing. This kind of a type system is called gradual typing, which is also implemented in other programming languages such as ActionScript. Hack's type system allows types to be specified for function arguments, function return values, and class properties; however, types of local variables are always inferred and cannot be specified.
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